Physics Energy Review

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

How does velocity affect kinetic energy?

Back

Kinetic energy increases with the square of the velocity. If velocity triples, kinetic energy increases by a factor of 9.

Front

What is potential energy (PE)?

Back

Potential energy is the energy stored in an object due to its position or configuration, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What happens to kinetic energy when an object moves up a ramp?

Back

As an object moves up a ramp, its kinetic energy decreases while its potential energy increases, assuming no energy is lost to friction.

Front

How do you calculate work done on an object?

Back

Work done is calculated using the formula Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is mechanical energy (ME)?

Back

Mechanical energy is the sum of kinetic energy and potential energy in a system.

Front

If an object has 200 J of kinetic energy at the lowest point, what is its total mechanical energy at a higher point without energy loss?

Back

The total mechanical energy remains 200 J, as energy is conserved.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy. If work is done on an object, its energy increases.

Front

What is the formula for calculating gravitational potential energy?

Back

Gravitational potential energy is calculated using the formula PE = mgh.